CN115403867A - Polypropylene composite material capable of being rapidly molded and preparation method thereof - Google Patents
Polypropylene composite material capable of being rapidly molded and preparation method thereof Download PDFInfo
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- CN115403867A CN115403867A CN202110577247.XA CN202110577247A CN115403867A CN 115403867 A CN115403867 A CN 115403867A CN 202110577247 A CN202110577247 A CN 202110577247A CN 115403867 A CN115403867 A CN 115403867A
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 48
- -1 Polypropylene Polymers 0.000 title claims abstract description 46
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 45
- 239000002131 composite material Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 25
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 25
- 239000002667 nucleating agent Substances 0.000 claims abstract description 25
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- 238000001125 extrusion Methods 0.000 claims abstract description 8
- 239000012745 toughening agent Substances 0.000 claims abstract description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 5
- 239000012764 mineral filler Substances 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 239000000155 melt Substances 0.000 claims description 23
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- 150000001412 amines Chemical class 0.000 claims description 9
- 229920001296 polysiloxane Polymers 0.000 claims description 9
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 8
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 4
- 239000012467 final product Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000002425 crystallisation Methods 0.000 abstract description 14
- 230000008025 crystallization Effects 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010899 nucleation Methods 0.000 abstract description 4
- 230000006911 nucleation Effects 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 14
- 238000001035 drying Methods 0.000 description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Substances [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 239000003153 chemical reaction reagent Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920005606 polypropylene copolymer Polymers 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- ORECYURYFJYPKY-UHFFFAOYSA-N n,n'-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexane-1,6-diamine;2,4,6-trichloro-1,3,5-triazine;2,4,4-trimethylpentan-2-amine Chemical compound CC(C)(C)CC(C)(C)N.ClC1=NC(Cl)=NC(Cl)=N1.C1C(C)(C)NC(C)(C)CC1NCCCCCCNC1CC(C)(C)NC(C)(C)C1 ORECYURYFJYPKY-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- LNKJESSHRFPVPE-UHFFFAOYSA-N 5-(diethylamino)pentyl 3,4,5-trimethoxybenzoate;hydrochloride Chemical compound Cl.CCN(CC)CCCCCOC(=O)C1=CC(OC)=C(OC)C(OC)=C1 LNKJESSHRFPVPE-UHFFFAOYSA-N 0.000 description 1
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/24—Crystallisation aids
Abstract
The invention discloses a polypropylene composite material capable of being rapidly molded and a preparation method thereof, wherein the polypropylene composite material is prepared from the following components in parts by weight: 48-89 parts of polypropylene, 5-20 parts of inorganic mineral filler, 5-10 parts of toughening agent, 0.01-0.03 part of nano ZnO, 0.01-0.03 part of alpha nucleating agent, 0.01-0.03 part of beta nucleating agent, 0.1-0.6 part of antioxidant and 0.1-0.6 part of dispersant. Mixing the components, performing melt extrusion by a double-screw extruder, and granulating to obtain the target product. The invention uses nano ZnO to match with the traditional alpha nucleating agent and beta nucleating agent to enable the composite material to achieve the effect of rapid nucleation and crystallization, and can avoid the secondary crystallization of the material in the later period, thereby being used for rapidly molded polypropylene parts, reducing the processing period and achieving the effect of stable size.
Description
Technical Field
The invention belongs to the field of modified materials, and particularly relates to a polypropylene composite material capable of being rapidly molded and a preparation method thereof.
Background
The polypropylene has wide application in the automobile field and interior and exterior trim products due to good comprehensive performance. However, in addition to the requirements for good mechanical properties, processability, weatherability and the like, some of the polypropylene products with complex dimensions require polypropylene materials with higher dimensional stability and lower post shrinkage. Meanwhile, with the development of a mold and the rapid development of the automobile industry, a shorter molding time is required for large-sized and ultrathin parts such as bumpers and instrument panels, for example, the molding time of multi-gate simultaneously-opened thin-wall bumpers is about 40s, and the molding period is twice as short as that of the conventional bumpers. The polypropylene is a crystalline polymer, the crystallization mode is heterogeneous nucleation, the crystallization period is slow, the formed crystals are incomplete, secondary crystallization can be generated when the temperature is slightly high or the standing time is prolonged, the size of the product is changed during the steps of standing or spraying again, and the like, and the performance of the polypropylene material is required to be further improved due to the defects.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a polypropylene composite material capable of being rapidly molded and a preparation method thereof.
The purpose of the invention is realized by the following technical scheme:
a polypropylene composite material capable of being rapidly molded is prepared from the following components in parts by weight:
preferably, the polypropylene is at least one of homo-polypropylene and co-polypropylene, and the melt index of the polypropylene is 3-120g/10min at 230 ℃ and 2.16 k.
Preferably, the inorganic mineral filler is at least one of talcum powder, calcium carbonate and barium sulfate.
Preferably, the toughening agent is POE, and the melt index of the POE is 0.1-10g/10min at 190 ℃ and 2.16 kg.
Preferably, the particle size of the nano ZnO is 10-100nm.
Preferably, the antioxidant is at least one of hindered amine antioxidant, hindered phenol antioxidant and phosphite antioxidant.
Preferably, the dispersant is a silicone dispersant.
The invention also discloses a preparation method of the polypropylene composite material capable of being rapidly molded, which comprises the following steps:
(1) Uniformly mixing polypropylene, inorganic mineral filler, toughening agent, nano ZnO material, alpha nucleating agent, beta nucleating agent, antioxidant and dispersing agent in parts by weight to obtain a mixed material;
(2) And (3) melting and extruding the mixed material by a double-screw extruder, and granulating to obtain the final product. Preferably, the processing parameters of the twin-screw extruder are as follows: the extrusion temperature is 190-230 ℃, and the screw rotation speed is 250-400 r/min.
Compared with the prior art, the invention has the beneficial effects that:
the nano ZnO component contained in the polypropylene composite material provided by the invention is an inorganic nano material, has extremely high surface activity, and can promote polypropylene to rapidly perform heterogeneous nucleation to form uniform and compact crystals; the nano ZnO can improve the crystallization temperature of the polypropylene material and achieve the effect of rapid crystallization; the crystallization process of the nano ZnO is cold crystallization, the development of the crystallization is promoted, and the proportion of melt crystallization can be reduced, so that the secondary crystallization of the material is reduced, the dimensional stability of the material after injection molding is improved, and the post-shrinkage rate is reduced. The alpha nucleating agent and the beta nucleating agent contained in the composite material enable the polypropylene composite material to have two crystal forms, so that the polypropylene has better rigidity and toughness, the transverse shrinkage and the longitudinal shrinkage are consistent, and the storage of dimensional stability is facilitated. The invention uses nano ZnO to match with the traditional alpha nucleating agent and beta nucleating agent to achieve the effect of rapid nucleation and crystallization, and can avoid the secondary crystallization at the later stage of the material, thereby being used for rapidly molded polypropylene parts, reducing the processing period and achieving the effect of stable size.
Detailed Description
The present invention will be further described with reference to the following examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The raw material types and manufacturers referred to in the following examples are as follows:
the copolymer polypropylene with a melt index of 45g/10min was selected from PP EA5076 from Basel;
the polypropylene copolymer with the melt index of 3g/10min is selected from PP K8003 of Shanghai Sicaceae;
the copolymer polypropylene with melt index of 10g/10min was selected from PP SP179 of zilu petrochemical;
the reagents are provided only for illustrating the sources and components of the reagents used in the experiments of the present invention, so as to fully disclose the reagents, and do not indicate that the present invention cannot be implemented by using other reagents of the same type or by using reagents supplied by other suppliers.
Example 1
Weighing 79.34 parts of copolymerized polypropylene with the melt index of 45g/10min, 12 parts of talcum powder, 8 parts of POE with the melt index of 3g/10min, 0.02 part of nano ZnO, 0.02 part of alpha nucleating agent NA-11.02 part, 5.02 parts of beta nucleating agent TMB, 0.1 part of hindered amine antioxidant Chimassorb944, 0.2 part of hindered phenol antioxidant and 0.3 part of silicone dispersant E525, and premixing in a high-speed mixer to obtain a uniformly-mixed material; and (3) placing the mixed material into a double-screw extruder, wherein the double-screw extruder melts and extrudes under the conditions that the temperature from the feeding section to the machine head is 180 ℃, 185 ℃, 190 ℃, 200 ℃, 195 ℃ and the screw rotating speed is 300 revolutions per minute in sequence, and granulating and drying to obtain the target product.
Example 2
Weighing 85.54 parts of homopolymerized polypropylene with a melt index of 60g/10min, 8 parts of calcium carbonate, 6 parts of POE with a melt index of 5g/10min, 0.02 part of nano ZnO, 0.11 part of alpha nucleating agent NA-11.02 part, 5.02 parts of beta nucleating agent TMB, 0.1 part of hindered amine antioxidant UV-3346, 0.05 part of hindered phenol antioxidant 1330, 0.05 part of phosphite antioxidant and 0.2 part of silicone dispersant E, and premixing in a high-speed mixer to obtain a uniformly mixed material; and (3) placing the mixed material into a double-screw extruder, wherein the temperature of the double-screw extruder from the feeding section to the head is 170 ℃, 180 ℃, 190 ℃, 195 ℃ and 195 ℃ in sequence, and the screw rotation speed is 300 revolutions per minute, and carrying out melt extrusion, granulation and drying to obtain the target product.
Example 3
Weighing 77.15 parts of polypropylene copolymer with the melt index of 3g/10min, 15 parts of barium sulfate, 7 parts of POE with the melt index of 1.2g/10min, 0.01 part of nano ZnO, 0.03 part of alpha nucleating agent NA-11.03 part, 0.01 part of beta nucleating agent TMB-5, 0.4 part of hindered amine antioxidant Chimassorb944 and 0.4 part of silicone dispersant E525, and premixing in a high-speed mixer to obtain a uniformly mixed material; and (3) placing the mixed material into a double-screw extruder, wherein the temperature of the double-screw extruder from the feeding section to the head is 170 ℃, 180 ℃, 190 ℃, 200 ℃ and 200 ℃ in sequence, and the screw rotation speed is 300 revolutions per minute for melt extrusion, granulation and drying to obtain the target product.
Example 4
40 parts of polypropylene copolymer with the melt index of 10g/10min, 49.77 parts of homopolymerized polypropylene with the melt index of 80g/10min, 3 parts of talcum powder, 2 parts of calcium carbonate, 5 parts of POE with the melt index of 0.1g/10min, 0.01 part of nano ZnO, 0.01 part of alpha nucleating agent NA-11.01 part, 5.01 parts of beta nucleating agent TMB-5.01 part, 0.05 part of hindered amine antioxidant Uvinul4050H, 0.05 part of hindered phenol antioxidant 1010 and 0.1 part of silicone dispersant E525 are pre-mixed in a high-speed mixer to obtain a uniformly mixed material; and (3) placing the mixed material into a double-screw extruder, performing melt extrusion on the double-screw extruder at the temperatures of 170 ℃, 180 ℃, 190 ℃, 195 ℃ and 195 ℃ in sequence from the feeding section to the head at the screw rotation speed of 300 revolutions per minute, granulating and drying to obtain the target product.
Example 5
Weighing 68.71 parts of homopolymerized polypropylene with the melt index of 120g/10min, 20 parts of talcum powder, 10 parts of POE with the melt index of 10g/10min, 0.03 part of nano ZnO, 0.11.03 part of alpha nucleating agent NA-11, 5.03 parts of beta nucleating agent TMB, 0.3 part of hindered amine antioxidant Uvinul4077H, 0.3 part of hindered phenol antioxidant 13300.3 and 0.6 part of silicone dispersant E525, and premixing in a high-speed mixer to obtain a uniformly mixed material; and (3) placing the mixed material into a double-screw extruder, wherein the double-screw extruder melts and extrudes under the conditions that the temperature from the feeding section to the machine head is 180 ℃, 190 ℃, 200 ℃, 210 ℃ and 210 ℃ in sequence, and the screw rotating speed is 300 revolutions per minute, and granulating and drying are carried out to obtain the target product.
Comparative example 1:
weighing 79.38 parts of copolymerized polypropylene with the melt index of 45g/10min, 12 parts of talcum powder, 8 parts of POE with the melt index of 3g/10min, 11.02 parts of alpha nucleating agent NA, 40.1 parts of hindered amine antioxidant Chimassorb9440.1 parts, 0.2 part of hindered phenol antioxidant and 0.3 part of silicone dispersant E525, and premixing in a high-speed mixer to obtain a uniformly mixed material; and (3) placing the mixed material into a double-screw extruder, performing melt extrusion on the double-screw extruder under the conditions that the temperature from a feeding section to a machine head is 180 ℃, 185 ℃, 190 ℃, 200 ℃, 195 ℃ and the screw rotation speed is 300 revolutions per minute in sequence, granulating and drying to obtain the target product.
Comparative example 2:
weighing 6 parts of homopolymerized polypropylene 85.56 parts with the melt index of 60g/10min, 8 parts of calcium carbonate, 6 parts of POE with the melt index of 5g/10min, 11.02 parts of alpha nucleating agent NA, 5.02 parts of beta nucleating agent TMB, 0.1 part of hindered amine antioxidant UV-3346, 0.05 part of hindered phenol antioxidant 1330, 0.05 part of phosphite antioxidant and 0.2 part of silicone dispersant E525, and premixing in a high-speed mixer to obtain a uniformly mixed material; and (3) placing the mixed material into a double-screw extruder, wherein the temperature of the double-screw extruder from the feeding section to the head is 170 ℃, 180 ℃, 190 ℃, 195 ℃ and 195 ℃ in sequence, and the screw rotation speed is 300 revolutions per minute, and carrying out melt extrusion, granulation and drying to obtain the target product.
The products prepared in the above examples 1 to 5 and comparative examples 1 to 2 were subjected to the performance test, and the test results are shown in the following table 1:
table 1: results of testing the Properties of the products prepared in each of examples and comparative examples
As can be seen from table 1 above, the products prepared in examples 1 and 2 have a lower rate of change in post-shrinkage and higher dimensional stability than those of comparative examples 1 and 2. Therefore, the method can be used for quickly forming the polypropylene product, reduces the processing period and achieves the effect of stable dimension.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (9)
1. A polypropylene composite material capable of being rapidly molded is characterized in that: the composition is prepared from the following components in parts by weight:
2. the rapidly formable polypropylene composite of claim 1, wherein: the polypropylene is at least one of homopolymerized polypropylene and copolymerized polypropylene, and the melt index of the polypropylene is 3-120g/10min at 230 ℃ and 2.16 k.
3. The rapidly formable polypropylene composite material of claim 1, wherein: the inorganic mineral filler is at least one of talcum powder, calcium carbonate and barium sulfate.
4. The rapidly formable polypropylene composite of claim 1, wherein: the toughening agent is POE, and the melt index of the toughening agent is 0.1-10g/10min at 190 ℃ under the condition of 2.16 kg.
5. The rapidly formable polypropylene composite of claim 1, wherein: the grain size of the nano ZnO is 10-100nm.
6. The rapidly formable polypropylene composite of claim 1, wherein: the antioxidant is at least one of hindered amine antioxidant, hindered phenol antioxidant and phosphite antioxidant.
7. The rapidly formable polypropylene composite material of claim 1, wherein: the dispersant is a silicone dispersant.
8. The method for preparing a polypropylene composite material capable of being rapidly molded according to any one of claims 1 to 7, wherein: the method comprises the following steps:
(1) Uniformly mixing polypropylene, inorganic mineral filler, toughening agent, nano ZnO, alpha nucleating agent, beta nucleating agent, antioxidant and dispersing agent in parts by weight to obtain a mixed material;
(2) And (3) melting and extruding the mixed material by a double-screw extruder, and granulating to obtain the final product.
9. The method of claim 8, wherein: the processing parameters of the double-screw extruder are as follows: the extrusion temperature is 190-230 ℃, and the screw rotation speed is 250-400 r/min.
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